Wifi always disconnecting

Hi,
I have an issue with my 6p. When I am connected to WiFi it randomly disconnects and reconnects for no obvious reason.
It happened with 5ghz or 2.5ghz network and with all the network that I used the past few weeks at different places.
Does anyone has the same issue?

Envoyé de mon Nexus 6P en utilisant Tapatalk

WiFi stops working on disconnecting from Tor (Android)

I have been using my neighbour's WiFi. From the beginning I couldn't access to YouTube or some of the major porn Websites or, use google play store to download or update softwares/games(which I discovered later. Without orbot, downloads/update would just stuck at pending/downloads).
So, I started using Orbot every time I wanted to use Play store or YouTube or any other website blocked.
Today I realized that I can no longer access internet without using Orbot(an exlaimation marks appears next to WiFi icon).
I want to understand what's going on here.
Thanks for your time reading.
P.S. I am new here.(This is my first post on XDA.)